common: Drop init.h from common header

Move this uncommon header out of the common header.

Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/arch/sh/lib/time.c b/arch/sh/lib/time.c
index 51e1cc1..d09f782 100644
--- a/arch/sh/lib/time.c
+++ b/arch/sh/lib/time.c
@@ -11,6 +11,7 @@
  */
 
 #include <common.h>
+#include <init.h>
 #include <asm/processor.h>
 #include <asm/io.h>